<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .top{
            color: green;
        }
        .main1 span{
            font-weight: bold;
            background-color: hotpink;
        }
        .main2{
            color:blue;
        }
        .footer{
            font-style: italic;
            text-decoration-line: underline;
        }
    </style>
</head>
<body>
    <h1 class="top">欢迎阅读本新闻</h1>
    <span class="main1">
        <span>新闻一</span>
        <span>新闻二</span>
        <span>新闻三</span>
    </span>
    <h1 class="main2">重大新闻1!</h1>
    <h3 class="footer">重大新闻2!</h3>
</body>
</html>